/Engine/Source/Developer/AutomationDriver/Public/IAutomationDriver.h
This doesn't invoke the locator until some action is performed on the element. You will need to invoke the GetElements() method on the collection to confirm the existence of any elements.
a driver element collection representing multiple elements potentially located by the specified locator
[TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IDriverElementCollection](API\Developer\AutomationDriver\IDriverElementCollection), ESPMode::ThreadSafe > FindElements ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IElementLocator](API\Developer\AutomationDriver\IElementLocator), ESPMode::ThreadSafe > & ElementLocator )